using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class GuideHeightLightComponent : MonoBehaviour {

    public int order=1;

    private GuideChangeData status=new GuideChangeData();
    private void OnEnable()
    {
        RunGuide = true;
    }

    public void ClearGuide()
    {
        Canvas canvas = gameObject.GetComponent<Canvas>();
        GraphicRaycaster graphic = gameObject.GetComponent<GraphicRaycaster>();


        if (graphic != null && status.isCreateGraphic)
        {
            Destroy(graphic);
        }

        if (canvas != null && status.isCreateCanvas)
        {
            Destroy(canvas);
        }
        else
        {
            if (canvas != null)
            {
                canvas.overrideSorting = status.OldOverrideSorting;
                canvas.sortingOrder = status.OldSortingOrder;
                canvas.sortingLayerName = status.oldSortingLayerName;
            }
        }
    }
    public void SetHeightLight()
    {
        Canvas canvas = GetComponent<Canvas>();
        GraphicRaycaster graphic = GetComponent<GraphicRaycaster>();

        if (canvas == null)
        {
            canvas = gameObject. AddComponent<Canvas>();

            status.isCreateCanvas = true;
        }

        if (graphic == null)
        {
            graphic =gameObject. AddComponent<GraphicRaycaster>();

            status.isCreateGraphic = true;
        }

        status.OldOverrideSorting = canvas.overrideSorting;
        status.OldSortingOrder = canvas.sortingOrder;
        status.oldSortingLayerName = canvas.sortingLayerName;

        ////如果检测到目标对象
        //bool oldActive = gameObject.activeSelf;
        //if (!oldActive)
        //{
        //    gameObject.SetActive(true);
        //}

        canvas.overrideSorting = true;
        canvas.sortingOrder = order;
        canvas.sortingLayerName = "Guide";


        //if (!oldActive)
        //{
        //    gameObject.SetActive(false);
        //}

    }
    bool RunGuide = false;
    private void Update()
    {
        if(RunGuide)
        {
            RunGuide = false;
            SetHeightLight();
        }
        
    }

    protected struct GuideChangeData
    {
        public bool isCreateCanvas;
        public bool isCreateGraphic;

        public string oldSortingLayerName;
        public int OldSortingOrder;
        public bool OldOverrideSorting;
    }
}